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Crankcase Vent , Necessary?
I have a 2.4 and was wondering if the OE rubber line coming from the Oil tank to the Back of the Factory Air Box is Necessary.. Im going to be putting K'N filters which wont allow for that hose. Is it ok for me to just Plug the HOLE on the Oil tank?
This will still leave one hose remaining .. from the Oil tank to the crankcase vent cover...
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71 Targa 2.4 WEBERS 915 box Drivetrain - http://forums.pelicanparts.com/porsche-911-technical-forum/410787-drivetrain-project-complete-3yrs-pics.html Interior - http://forums.pelicanparts.com/porsche-911-technical-forum/452686-interior-refurb-carbon-fiber-71-a.html#post4433500 |
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10-25-2007, 08:23 PM
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You will still need to vent the tank. Use a small "overflow" tank with a small K&N type of air filter.
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Aaron.  F.S. 1965 Solex engine w carbs/cleanerBurnham Performance https://www.instagram.com/burnhamperformance/ |
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10-25-2007, 09:17 PM
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What kind of tank do you mean? Why is it necessary?
Anyone who has K/N filters have a photo of what they've done?
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71 Targa 2.4 WEBERS 915 box Drivetrain - http://forums.pelicanparts.com/showthread.php?t=410787 Interior - http://forums.pelicanparts.com/showthread.php?p=4433500#post4433500 |
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10-26-2007, 08:40 AM
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Below is a picture of an engine supertec built, this was posted on another thread by henry schmidt it shows a similar thing described above where the oil breather is attached to a small tank that drains back to the crank case. I belive the part used is from a later 90's porsche henry may chime in with more details.
 Steve
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1972 911t RS Styled G50 conversion underway 1972t Resto Project - http://www.ddk-online.com/phpBB2/viewtopic.php?t=16695 |
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10-26-2007, 03:08 PM
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Just use a thing of skippy...
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2012 911 Black Edition Cabriolet 2008 Cayman S Grey on Black - flooded, written off 1977 930 Turbo Carrera Black on Red #411 1987 951 Black on Black - sold to make room for the 930 1972 911 2.7 - I regret selling her every single day.... |
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10-26-2007, 04:12 PM
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Here is mine..............
 cheers
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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10-26-2007, 09:17 PM
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Jeff, where did you plumb in the oil return line? It seems to me that the vent line produces significant oil vapor from the tank, even though the tank itself is intended to act as an air/oil separator with a headspace above the oil level. I would expect that oil would condense in the vent and need to go somewhere, although Porsche's solution, at least on my '66 and '71, was to run the vapor to the air cleaner and then vent the liquid oil from the air cleaner overboard to that funny cylindrical thing with the rubber cap on the engine!
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'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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10-27-2007, 04:09 AM
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Komenda Fan.. Did you just Plug yours up? I still dont really see why it is Necessary.... but If I have to use something.. Whats the Least expensive Best looking thing I can do?
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71 Targa 2.4 WEBERS 915 box Drivetrain - http://forums.pelicanparts.com/showthread.php?t=410787 Interior - http://forums.pelicanparts.com/showthread.php?p=4433500#post4433500 |
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10-27-2007, 07:03 AM
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You want cheep?
Howz'a bout a mixed nuts container from Costco.  An AX will put 8 oz of oil in there. ....... 
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10-27-2007, 07:29 AM
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Quote:
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Aaron. F.S. 1965 Solex engine w carbs/cleanerBurnham Performance https://www.instagram.com/burnhamperformance/ |
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10-27-2007, 09:04 AM
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John, the comming out the bottom is now a clear tube that runs verticaly back up the side of the tank. This way it can show me the how much oil is in can. So far, after only 350 miles, there is no oil in the can....
Cheers
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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10-27-2007, 09:19 AM
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GotaT, it might be hard to see, but mine runs to behind the 72 oil filter assembly and then back out to the skippy. I love it, because its light weight and easy to check visually. Plus, since my car was repainted ten years ago from Viper Green to Silverish, the lid is my only real link to Viper Green! Well, that and a few paint chips...
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2012 911 Black Edition Cabriolet 2008 Cayman S Grey on Black - flooded, written off 1977 930 Turbo Carrera Black on Red #411 1987 951 Black on Black - sold to make room for the 930 1972 911 2.7 - I regret selling her every single day.... |
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10-27-2007, 10:04 AM
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So Basically, All I really need is a Hose coming out of the tank with a Filter of Any sort and a Tank to catch Any Oil that the Filter would not.... Right?
There must be some sort of Generic Breather/Filter that could be fitted in an Discrete Place..
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71 Targa 2.4 WEBERS 915 box Drivetrain - http://forums.pelicanparts.com/showthread.php?t=410787 Interior - http://forums.pelicanparts.com/showthread.php?p=4433500#post4433500 |
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10-28-2007, 08:07 AM
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i used a section of washing machine discharge line from Home Depot and the K&N breather. The stock hose bends are perfect. The engine is tight so no noticable fumes and no oil fume discharge layer in compartment. The high angle returns oil droplets. It may not be track legal in some areas of the US.
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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11-01-2007, 12:45 PM
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See,.. now Thats what Im talkin' about!.. thats exactly what I was thinking of!... Thanks for all the posts! .. Cant wait to get my car back on the road w/ my Custom Ground Cams!...
Later
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71 Targa 2.4 WEBERS 915 box Drivetrain - http://forums.pelicanparts.com/showthread.php?t=410787 Interior - http://forums.pelicanparts.com/showthread.php?p=4433500#post4433500 |
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11-01-2007, 04:22 PM
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you still need the hose from engine to tank.
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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11-01-2007, 05:06 PM
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